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This part of ISO 16532 specifies a method for the determination of the grease resistance of paper and board. Primarily, it is intended to establish an approximate level of grease resistance, by testing the degree of surface repellency and/or antiwicking characteristics of paper and board, internally or surface sized with organophobic materials such as fluorocarbons. Some packaging paper and board products, designed for containing pet foods, food for human consumption and other materials, are produced in this way, and any surface stains, due to grease wetting or penetrating the paper or board surface, are aesthetically unacceptable. This test is not intended to determine the permeability of grease through the paper or board, for which ISO 16532-1 applies.